A pressure switch for an electric pressure cooker

Abstract

The present invention relates to an electric pressure cooker pressure switch, comprising a fixed column, a rigid long sheet and a rigid short sheet connected to the fixed column, a spring sheet rotatably connected to the rigid long sheet, and a trigger block driving the spring sheet to rotate, wherein the trigger block comprises a screw penetrating the rigid long sheet and the spring sheet, a block threadedly connected to the screw, and a spring sleeved on the screw rod, wherein the spring is elastically compressed between the spring sheet and the rigid long sheet. The present invention provides an electric pressure cooker pressure switch, which has a simple and compact structure, occupies less space, and can effectively save materials and reduce product costs.

Description

Technical Field

[0001] The invention relates to the field of switches, in particular to a pressure switch for an electric pressure cooker. Background Art

[0002] With the improvement of people's living standards, electric pressure cookers have been effectively popularized, and almost every household is equipped with an electric pressure cooker. As an important kitchen appliance, electric pressure cookers greatly reduce the difficulty of cooking, but they also bring additional safety issues. Excessive pressure in the pot can cause damage to the electric pressure cooker or even explosion. At present, the pressure of the inner pot is mostly adjusted by the pressure switch of the electric pressure cooker; specifically, the pot is continuously heated and the temperature and pressure are increased, the inner pot presses the heating plate down, and the pressure switch is connected to the heating plate. When the pressure value reaches the predetermined pressure, the pressure switch cuts off the power of the main board and stops heating. After cooling to a certain temperature and the pressure drops, the pressure switch turns on the pressure cooker for heating again, and the cycle repeats. However, the traditional electric pressure cooker pressure switch has a relatively complex structure and needs to be composed of five plates. The production cost is high, and in order to ensure the stability of the structure, it needs to be made of relatively expensive pure copper, which makes the pressure switch of the electric pressure cooker high-priced for a long time and difficult to improve. Summary of the invention

[0003] In view of this, the present invention provides a pressure switch for an electric pressure cooker, which has a simple and compact structure, occupies less space, and can effectively save materials and reduce product cost.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A pressure switch for an electric pressure cooker comprises a fixed column, a rigid long sheet and a rigid short sheet connected to the fixed column, a spring sheet rotatably connected to the rigid long sheet, and a trigger block driving the spring sheet to rotate, wherein the trigger block comprises a screw penetrating the rigid long sheet and the spring sheet, a block body threadably connected to the screw, and a spring sleeved on a screw rod of the screw, wherein the spring is elastically compressed between the spring sheet and the rigid long sheet.

[0006] Preferably, the fixing column is made of insulating material, and the rigid long piece, the rigid short piece and the spring piece are all made of conductive material.

[0007] Preferably, a vertical piece intersecting with the plane where the rigid long piece is located is arranged on the rigid long piece, a connecting joint is arranged on the vertical piece, and the spring piece is driven to rotate with the connecting joint as the center by the trigger block.

[0008] Preferably, the spring piece includes a middle straight piece, a first curved piece and a first straight piece located on one side of the middle straight piece, and a second curved piece and a second straight piece located on the other side of the middle straight piece, the first curved piece and the second curved piece are connected to one end of the middle straight piece, and the first straight piece and the second straight piece are connected to the other end of the middle straight piece.

[0009] Preferably, there is a gap between the first curved piece and the first straight piece, and there is a gap between the second curved piece and the second straight piece. The spring piece has two vertical pieces and two connecting joints, which are respectively referred to as the first connecting joint and the second connecting joint. The first connecting joint is located in the gap between the first curved piece and the first straight piece, and the second connecting joint is located in the gap between the second curved piece and the second straight piece.

[0010] Preferably, the first bending piece is bent toward the rigid long piece, and the second bending piece is bent toward the rigid long piece.

[0011] Preferably, the first curved piece is provided with a first baffle, the first straight piece is provided with a second baffle, and the first connecting joint is jointly enclosed by the first curved piece, the first baffle, the first straight piece, and the second baffle; the second curved piece is provided with a third baffle, the second straight piece is provided with a fourth baffle, and the second connecting joint is jointly enclosed by the second curved piece, the third baffle, the second straight piece, and the fourth baffle.

[0012] Preferably, a first contact is provided on the rigid short piece, and a second contact is provided on the spring piece. When the spring piece is not subjected to external force, the first contact is in contact with the second contact and is electrically connected. A protrusion is provided on the rigid long piece, and the center of the protrusion, the center of the first contact, and the center of the second contact are located on the same straight line.

[0013] Preferably, the rigid long piece is provided with a long piece hole sleeved on the fixing column and a long piece terminal connected to the external circuit, and the rigid short piece is provided with a short piece hole sleeved on the fixing column and a short piece terminal connected to the external circuit.

[0014] Preferably, the vertical piece and the rigid long piece are integrally formed.

[0015] The beneficial effects of the present invention compared with the prior art are:

[0016] The pressure switch for an electric pressure cooker of the present invention is different from the traditional complex structure of five plates. It only needs three plates to realize the pressure switch function, which can effectively reduce the amount of materials required for making the pressure switch, and does not need to use expensive pure copper, which can effectively reduce the unit price of materials, thereby improving the status quo that the pressure switch for traditional electric pressure cookers has been in a high price for a long time. Its structure is simple and compact, occupies less space, and can effectively save materials and reduce product costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a three-dimensional structural diagram of a pressure switch for an electric pressure cooker according to an embodiment of the present invention.

[0018] Figure 2 The figure is a three-dimensional structural diagram of a pressure switch for an electric pressure cooker according to an embodiment of the present invention.

[0019] Figure 3 The figure is a side view of a pressure switch for an electric pressure cooker according to an embodiment of the present invention.

[0020] Figure 4 FIG. 4 is a structural diagram of a spring in one embodiment of the present invention.

[0021] Figure 5 FIG. 4 is a structural diagram of a spring in one embodiment of the present invention.

[0022] Figure 6 1 is a structural diagram of a rigid long sheet in one embodiment of the present invention.

[0023] Figure 7 1 is a structural diagram of a rigid long sheet in one embodiment of the present invention. DETAILED DESCRIPTION

[0024] To facilitate understanding by those skilled in the art, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0025] Please refer to Figure 1-7 , the embodiment of the present invention includes:

[0026] A pressure switch for an electric pressure cooker comprises a fixed column 1, a rigid long sheet 2 and a rigid short sheet 3 connected to the fixed column 1, a spring sheet 4 rotatably connected to the rigid long sheet 2, and a trigger block 5 for driving the spring sheet 4 to rotate, wherein the trigger block 5 comprises a screw 6 penetrating the rigid long sheet 2 and the spring sheet 4, a block 7 threadedly connected to the screw 6, and a spring 8 sleeved on the screw rod of the screw 6, wherein the spring 8 is elastically compressed between the spring sheet 4 and the rigid long sheet 2. The fixed column 1 is made of insulating material, and the rigid long sheet 2, the rigid short sheet 3, and the spring sheet 4 are all made of conductive material.

[0027] The rigid long piece 2 is provided with a vertical piece 9 intersecting with the plane where the rigid long piece 2 is located, and a connecting joint is provided on the vertical piece 9. The spring piece 4 is driven to rotate with the connecting joint as the center by the trigger block 5. The spring piece 4 includes a middle straight piece 10, a first curved piece 11 and a first straight piece 12 located on one side of the middle straight piece 10, and a second curved piece 13 and a second straight piece 14 located on the other side of the middle straight piece 10. The first curved piece 11 and the second curved piece 13 are connected to one end of the middle straight piece 10, and the first straight piece 12 and the second straight piece 14 are connected to the other end of the middle straight piece 10. There is a gap between the first curved piece 11 and the first straight piece 12, and there is a gap between the second curved piece 13 and the second straight piece 14. The spring piece 4 has two vertical pieces and two connecting joints, which are respectively recorded as the first connecting joint 15 and the second connecting joint 16. The first connecting joint 15 is located in the gap between the first curved piece 11 and the first straight piece 12, and the second connecting joint 16 is located in the gap between the second curved piece 13 and the second straight piece 14. The first curved piece 11 is curved toward the rigid long piece 2 , and the second curved piece 13 is curved toward the rigid long piece 2 .

[0028] The first curved piece 11 is provided with a first baffle 17, the first straight piece 12 is provided with a second baffle 18, the first connection joint 15 is enclosed by the first curved piece 11, the first baffle 17, the first straight piece 12, and the second baffle 18; the second curved piece 13 is provided with a third baffle 19, the second straight piece 14 is provided with a fourth baffle 20, and the second connection joint 16 is enclosed by the second curved piece 13, the third baffle 19, the second straight piece 14, and the fourth baffle 20. The rigid short piece 3 is provided with a first contact 21, the spring piece 4 is provided with a second contact 22, when the spring piece 4 is not subjected to external force, the first contact 21 and the second contact 22 are in contact and electrically connected, and the rigid long piece 2 is provided with a protrusion 23, the center of the protrusion 23, the center of the first contact 21, and the center of the second contact 22 are located on the same straight line. The rigid long piece 2 is provided with a long piece sleeve hole 24 sleeved on the fixing column 1 and a long piece terminal 25 connected to an external circuit, and the rigid short piece 3 is provided with a short piece sleeve hole sleeved on the fixing column 1 and a short piece terminal 26 connected to an external circuit. The vertical piece 9 is integrally formed with the rigid long piece 2.

[0029] The working principle is as follows: fix the fixed column 1 firmly in the electric pressure cooker, and make the block 7 contact with the inner pot. When the pressure of the inner pot is less than the preset pressure, the spring 4 keeps the second contact 22 on it in contact with the first contact 21 under the joint action of the spring and the first curved piece 11 and the second curved piece 13. At this time, the heating system circuit in the electric pressure cooker is connected, and the heating system inside the electric pressure cooker heats the inner pot; when the pressure of the inner pot is greater than the preset pressure, the block 7 moves downward and contacts and squeezes the spring 4. The spring 4 moves downward due to the pressure from the block 7. When the spring 4 moves downward to the inflection point, the spring 4 rotates. At this time, the spring 4 rotates with the vertical piece 9 as the rotation center. After the rotation, the second contact 22 separates from the first contact 21. At this time, the heating system circuit in the electric pressure cooker is disconnected, and the heating system inside the electric pressure cooker stops heating the inner pot. Repeated heating until the preset heating time is reached.

[0030] Although the present invention is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes according to the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A pressure switch for an electric pressure cooker, characterized in that: The invention comprises a fixing column (1), a rigid long sheet (2) and a rigid short sheet (3) connected to the fixing column (1), a spring sheet (4) rotatably connected to the rigid long sheet (2), and a trigger block (5) for driving the spring sheet (4) to rotate, wherein the trigger block (5) comprises a screw (6) provided through the rigid long sheet (2) and the spring sheet (4), a block (7) threadedly connected to the screw (6), and a spring (8) sleeved on the screw rod of the screw (6), wherein the spring (8) is elastically compressed between the spring sheet (4) and the rigid long sheet (2); the fixing column (1) is made of insulating material, and the rigid long sheet (2), the rigid short sheet (3) and the spring sheet (4) are all made of conductive material. The rigid long piece (2) is provided with a vertical piece (9) intersecting with the plane where the rigid long piece (2) is located, and the vertical piece (9) is provided with a connecting joint, and the elastic piece (4) is driven to rotate with the connecting joint as the center and by the trigger block (5); the elastic piece (4) comprises a middle straight piece (10), a first curved piece (11) and a first straight piece (12) located on one side of the middle straight piece (10), and a second curved piece (13) and a second straight piece (14) located on the other side of the middle straight piece (10), the first curved piece (11) and the second curved piece (13) are connected to one end of the middle straight piece (10), and the first straight piece (12) and the first straight piece (14) are connected to one end of the middle straight piece (10). The second straight piece (14) is connected to the other end of the middle straight piece (10); there is a gap between the first curved piece (11) and the first straight piece (12), and there is a gap between the second curved piece (13) and the second straight piece (14); the spring piece (4) has two vertical pieces and two connecting joints, which are respectively denoted as a first connecting joint (15) and a second connecting joint (16); the first connecting joint (15) is located in the gap between the first curved piece (11) and the first straight piece (12), and the second connecting joint (16) is located in the gap between the second curved piece (13) and the second straight piece (14); the first curved piece (11) is bent toward the rigid long piece (2), and the second curved piece (13) is bent toward the rigid long piece (2). The bending piece (13) is bent in the direction of the rigid long piece (2); the first bending piece (11) is provided with a first baffle (17), the first straight piece (12) is provided with a second baffle (18), and the first connecting joint (15) is enclosed by the first bending piece (11), the first baffle (17), the first straight piece (12), and the second baffle (18); the second bending piece (13) is provided with a third baffle (19), the second straight piece (14) is provided with a fourth baffle (20), and the second connecting joint (16) is enclosed by the second bending piece (13), the third baffle (19), the second straight piece (14), and the fourth baffle (20);The rigid short piece (3) is provided with a first contact (21), the spring piece (4) is provided with a second contact (22), when the spring piece (4) is not subjected to an external force, the first contact (21) and the second contact (22) are in contact and electrically connected, the rigid long piece (2) is provided with a protrusion (23), the center of the protrusion (23), the center of the first contact (21), and the center of the second contact (22) are located on the same straight line. ; 2. The pressure switch for an electric pressure cooker according to claim 1, characterized in that: The rigid long piece (2) is provided with a long piece sleeve hole (24) sleeved on the fixing column (1), and a long piece terminal (25) connected to an external circuit, and the rigid short piece (3) is provided with a short piece sleeve hole sleeved on the fixing column (1), and a short piece terminal (26) connected to an external circuit.

3. The pressure switch for an electric pressure cooker according to claim 1, characterized in that: The vertical piece (9) and the rigid long piece (2) are integrally formed.

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